Attempt Number: 3
Error Message: The action and resulting child state have already been explored.

Action Reasoning:
The current state has Robot1 at tile_1-1 holding black paint. The goal is to paint tile_0-0 black. Since the robot is already holding black paint and tile_0-0 is directly above tile_1-0, the next logical step is to move Robot1 left to tile_1-0. This will position the robot directly below tile_0-0, allowing it to paint the tile above in the next step.

New State Description:
Robot1 is now at tile_1-0, holding black paint. Tile_1-0 is occupied by the robot, and tile_1-1 is now clear.

Action Chosen:
left(robot1, tile_1-1, tile_1-0)
